Results 31 to 40 of about 3,443,078 (337)

Contrast sensitivity functions in autoencoders

Journal of Vision, 2022
Three decades ago, Atick et al. suggested that human frequency sensitivity may emerge from the enhancement required for a more efficient analysis of retinal images. Here we reassess the relevance of low-level vision tasks in the explanation of the Contrast Sensitivity Functions (CSFs) in light of (1) the current trend of using artificial neural ...
Li, Qiang, Gomez-Villa, Alex, Bertalmío, Marcelo, Malo, Jesús   +3 more
openaire   +6 more sources

Influence of contrast media dose and osmolality on the diagnostic performance of contrast fractional flow reserve [PDF]

, 2017
Background—Contrast fractional flow reserve (cFFR) is a method for assessing functional significance of coronary stenoses, which is more accurate than resting indices and does not require adenosine.
Berry, Colin, Choi, Dong-Hyun, De Bruyne, Bernard, Fearon, William F., Gould, K. Lance, Jeremias, Allen, Johnson, Nils P., Kobayashi, Yuhei, Nishi, Takeshi, Oldroyd, Keith G., Pijls, Nico H.J.   +10 more
core   +1 more source

Hyperbaric Oxygen Effects on Contrast and Macular Light Sensitivity in Dry Type Age-Related Macular Degeneration Patients

Folia Medica Indonesiana, 2021
This study was to compare the effectiveness of hyperbaric oxygen therapy (HBOT) on contrast and macular light sensitivity improvement in dry type age-related macular degeneration (AMD) patients.
Indriani Kartika Dewi, Moestidjab Moestidjab, Titut Harnanik   +2 more
doaj   +1 more source

Octopaminergic modulation of contrast sensitivity

Frontiers in Integrative Neuroscience, 2012
Sensory systems adapt to prolonged stimulation by decreasing their response to prevailing stimulus conditions. Whereas visual motion adaptation has traditionally been studied in immobilized animals, recent work indicates that the animal’s behavioral ...
Roel ede Haan, Yu-Jen eLee, Karin eNordström   +2 more
doaj   +1 more source

Imaging ultra thin layers with helium ion microscopy: Utilizing the channeling contrast mechanism [PDF]

, 2012
Background: Helium ion microscopy is a new high-performance alternative to classical scanning electron microscopy. It provides superior resolution and high surface sensitivity by using secondary electrons.\ud \ud Results: We report on a new contrast ...
Gastel, R. van, George, A., Hlawacek, G., Lorbek, S., Mocking, T.F., Poelsema, B., Veligura, V., Zandvliet, H.J.W.   +7 more
core   +3 more sources

Contrast sensitivity in β-thalassemic patients

Journal of the Egyptian Ophthalmological Society, 2015
Aim of work This work aimed to diagnose any abnormalities in contrast sensitivity and retinal functions in β-thalassemic patients. Patients and methods Thirty patients diagnosed with b-thalassemia were included in this study.
Tamer H El-Sersy, Heba W El-Saed
doaj   +1 more source

Comparison of the outcome of partial time occlusion therapy in strabismic versus anisometropic moderate amblyopes

Journal of the Egyptian Ophthalmological Society, 2022
Background Early in life, selective visual input disruption to one eye compromises most of the visual aspects, resulting in amblyopia, with a great social and economic effect.
Momen M Hamdi, Amr S Galal, Tarek R Ragheb, Samah M Fawzy   +3 more
doaj   +1 more source

Spatial contrast sensitivity in adolescents with autism spectrum disorders [PDF]

, 2010
Adolescents with autism spectrum disorders (ASD) and typically developing (TD) controls underwent a rigorous psychophysical assessment that measured contrast sensitivity to seven spatial frequencies (0.5-20 cycles/degree). A contrast sensitivity function
A Bertone, A Lahaie, AB Watson, APA, B Jemel, BS Abrahams, C Deruelle, C Deruelle, C Jarrold, C Kemner, C Lord, DH Kelly, E Ashwin, E Milne, E Milne, E Milne, E Pellicano, EJ Gumbel, Elizabeth Milne, F Faul, F Happé, F Happé, H Tager-Flusberg, HC Hughes, Hwan Cui Koh, J Gwiazda, J Katsyri, JA Movshon, JC Badcock, JE Scharre, JG Robson, JN Constantino, Karen Dobkins, KL Gunther, KR Dobkins, L Beglinger, L Mottron, M Behrmann, M Behrmann, M Rutter, MA Boeschoten, MA Boeschoten, MA Boeschoten, MJ Brosnan, MM Taylor, MV Jonge de, NL Johnson, O Tadevosyan-Leyfer, R Davis, S Risi, V Virsu, WH Ridder, XQ Liu   +52 more
core   +1 more source

Motion processing deficits in migraine are related to contrast sensitivity [PDF]

, 2012
Background: There are conflicting reports concerning the ability of people with migraine to detect and discriminate visual motion. Previous studies used different displays and none adequately assessed other parameters that could affect performance, such ...
Beaumont, H.M., Hine, T.J., Shepherd, Alex J.   +2 more
core   +1 more source

Active Learning to Characterize the Full Contrast Sensitivity Function in Cataracts

Clinical Ophthalmology, 2022
Filippos Vingopoulos,1,2 Megan Kasetty,1 Itika Garg,1,2 Rebecca F Silverman,1 Raviv Katz,1,2 Ryan A Vasan,3 Alice C Lorch,3 Zhonghui K Luo,3 John B Miller1,2 1Harvard Retinal Imaging Lab, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA;
Vingopoulos F, Kasetty M, Garg I, Silverman RF, Katz R, Vasan RA, Lorch AC, Luo ZK, Miller JB   +8 more
doaj